Effects of different timing nutritional support on the growth and development < 2 kg newborns and mothers' anxiety and depression

Table 6 Comparison of growth and development indicators between two groups of children before and after nutritional support, mean ± SD

Index	Stage	Group S (n = 32)	Group L (n = 32)	t value	P value
Weight (kg)	Before intervention	1.63 ± 0.26	1.66 ± 0.32	0.412	0.682
	After intervention	2.48 ± 0.51a	2.19 ± 0.39a	2.555	0.013
length (cm)	Before intervention	41.15 ± 3.17	41.31 ± 3.28	0.198	0.843
	After intervention	48.69 ± 5.15a	46.08 ± 5.03a	2.051	0.045
Head circumference (cm)	Before intervention	30.24 ± 3.63	30.22 ± 3.59	0.022	0.982
	After intervention	33.95 ± 2.28a	32.45 ± 2.06a	2.761	0.007

^aP < 0.05, compared with before intervention in the same group.